Case Studies

CASE STUDY · PRODUCT MODERNIZATION

IBAN validation platform, rebuilt in one week.

From a legacy checker to an international validation platform.

PCSG rebuilt the established IBAN-Test service on QUIQQER in one week: international and German websites, registration and user management, products and ordering, the validation API and migrated validation logic. In the following two weeks, IBAN-Test expanded bank-directory checks from Germany to 40 countries with its own QUIQQER module.

Visit IBAN-Test See the implementation
1 week
Core rebuild and launch
2 weeks
Expansion from Germany to 40 countries
115 formats
Structural IBAN checks

THE PROJECT

Keep the proven logic. Rebuild the product around it.

The challenge was not starting over. It was modernizing IBAN-Test without losing the domain knowledge that already made it work.

IBAN-Test was an established PCSG project with specialized validation logic and a German bank-data foundation. The rebuild had to preserve that domain knowledge while replacing the surrounding product experience.

QUIQQER became the shared platform for public content, registration, user management, products, ordering, the validation API and the migrated validation service. After launch, IBAN-Test quickly built a dedicated QUIQQER module and used it to extend directory-backed validation from Germany to 40 countries over the following two weeks.

THE CHALLENGE

A one-week rebuild designed for the expansion that followed.

Preserve domain logic

Move the proven IBAN validation logic into the new platform without turning the rebuild into a complete rewrite of the product core.

Add a complete ordering flow

Connect the public website with registration, product presentation and ordering instead of operating them as separate systems.

Make bank data modular

Create a dedicated QUIQQER module so new bank directories could be added cleanly after the initial rebuild.

Ship the core in one week

Coordinate website, commerce and validation-logic migration in a single focused delivery sprint.

BANK DATA VALIDATION

From one national directory to coverage across 40 countries.

IBAN-Test first verifies format and checksum. After the one-week rebuild, the team created its own QUIQQER bank-data module and used it to add further directories without friction over the following two weeks.

  • Directory-backed validation for 40 countries
  • Format support for 115 IBAN structures
  • Bank details returned where available
  • Available through web tools, REST API and MCP
IBAN-Test bank directory coverage showing 40 supported countries
The live IBAN-Test platform presents the supported bank-directory countries in a clear, scannable grid.

THE IMPLEMENTATION

One QUIQQER foundation for content, commerce and validation.

01

Product experience

A new public website explains validation depth, supported countries, pricing and the available access paths.

02

Logic migration

The existing validation expertise was carried forward and integrated into the new modular application structure.

03

Ordering system

User registration, products and ordering now belong to the same platform as the service they provide access to.

04

Custom bank-data module

After launch, IBAN-Test built a dedicated QUIQQER module and expanded the directory layer from Germany to 40 countries over the following two weeks.

05

AI-assisted content and localization

QUIQQER's AI MCP interface supported the creation of structured content pages and their translation for the German-language offering.

AI-ASSISTED CONTENT ROLLOUT

A product platform that can also build out its own content.

With the QUIQQER AI MCP module, the team could create structured content pages directly in the CMS and support their translation. The country hub at iban-test.eu/iban is one visible example; the localized offering is available at iban-test.de.

THE RESULT

Built to launch fast. Designed to keep growing.

IBAN-Test became a complete QUIQQER product platform—unified, international and ready for new services.

QUIQQER end to end

Website, content, registration, user management, products, ordering, validation API and application logic share one platform.

International

Directory-backed bank validation now covers 40 countries rather than Germany alone.

Multi-channel

Users can work through the online checker and generator or automate validation through REST API and MCP.

Extendable

The modular QUIQQER foundation leaves room for additional data sources, products and service workflows.

AI-enabled

Structured content pages can be created through the AI MCP interface while remaining native QUIQQER content.

Localized

The product now presents dedicated international and German-language offerings.

SEE IT IN PRODUCTION

Explore the rebuilt IBAN-Test platform.

Try the public validation tools or review how QUIQQER combines content, users, commerce and custom application logic.

Visit IBAN-Test What you can build

AI & MCP

Ready to connect your AI agent?

Connect AI clients to public QUIQQER skills, installation guidance and the capability catalog; machine-readable setup instructions are available in llms.txt.

https://www.quiqqer.com/mcp